CODEWITHSUNDEEP
cmakefilebuildmingw32
Rajdeep Manjre
Rajdeep Manjre

Reputation: 1

Error while doing make: mingw32-make: *** No rule to make target

I have to create a Makefile which creates a single executable from the .c files in different folders. The .c files include header files from any of these folders. The root directory has 3 sub directories x/y, x/z, a, all these sub directories have some .c and .h files. I want to compile the program from the root directory. The nature of these sub directories is that new .c files may be added/removed anytime so it is not possible to hard code their names in the Makefile.

So far I have created this Makefile

CC = gcc
INCLUDES = -Ix/y -Ix/z -Ia -Ilib/include
LIB = -lp -lq -lr

demo: x/y/*_d.o x/z/*_l.o a/*_m.o
    $(CC) $^ $(LIB) -Llib -o b/demo.exe

%_d.o:: x/y/%.c
    $(CC) $(INCLUDES) -c $<

%_l.o:: x/z/%.c
    $(CC) $(INCLUDES) -c $<

%_m.o:: a/%.c
    $(CC) $(INCLUDES) -c $<

I need a solution that will take care of this scenario on its own. Also, if a single file is added to one of these folders then only its dependencies should be built instead of building all .c files all over again. TIA.

Upvotes: 0

Views: 1605

Answers (1)

Richard at ImageCraft
Richard at ImageCraft

Reputation: 665

You are mostly there. You just need a simple rule to compile .c into a .o, something like

.c.o: $(CC) $(INCLUDES) -c $<

Dependencies with wildcards are OK.

Upvotes: 0

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